Bomb for use with alpha special bomb-thrower, or with firearms already existing and having alpha smaller caliber than the bomb



D. SAMAIA 1,866,223 EARHS ALREADY R THAN THE BOMB 2 Sheets-Sheet l l/vvezvra R 2 San W4 BOMB THROWER on WITH FIR Filed May 6, 1929 EXISTING AND HAVING A SMALLER CALIBE BOMB FOR USE WITH A SPECIAL May 19, 1931.

May 19,- 1931. D. SAMAIA 1,896,223 BOMB FOR USE WITH A SPECIAL BOMB THROWE'R OR WITH FIREARM ALREADY EXISTING AND HAVING A SMALLER CALIBER THAN THE BOMB I 2 Sheets-Sheet 2 Filed May 6, 1929 Patented May 19, 1931 UNITED STATES PATENT OFFICE n-mo SAMAIA, or MILAN, ITALY BOMB FOR USE WITH A SPECIAL BOMB-THROWER, OR WITH FIREARMS ALREADY EXISTING AND HAVING A SMALLER CALIBER THAN THE .IBOMB Application filed May 6, 1929,,Seria1 No. 360,954, and in Italy May 22, 1928.

The present invention relates to a bomb which can be thrown by a special bombthrower or also by firearms already commonly used, and of a smaller caliber than the The bomb according to the invention utilizes the elastic force of the gases, in part andfor a certain time, evenafter the bomb has left the barrel of the firearmj 1O One of the practical embodiments of the invention is illustrated, by Way of example only, in the accompanying drawings; in which:

Fig. lshows the bomb in longitudinal sec- 15 tlOIl.

Fig. 2 is an external view of the bomb.

Fig. 3 shows a cup-like sleeve 1n outside view and plan;

Fig. 4 is an outside view of a similar cup- 39 like sleeve fitted with a tubular extenslon.

Fig. 5 is a section showing the bomb as loaded in a bomb-thrower.

Fig. 6 is a section of the cuplike sleeve (Fig. 3) as applied to a firearm.

Fig. 7 is a section of the cuphke sleeve fitted with tubular extension (Fig. 4) as applied to a firearm.

As may be seen from Fig. 1, the bomb comprises a bomb body -amade up of a cylinder and two rounded ends. To the bottom rounded end a tail piece e 1s fixed; the top rounded end is provided with a recess in which the fuse b with its detonator is screwed. At the point where the top rounded end joins the cylindrical portion of the bomb there is applied to the outside of the bomb a tube d, the inner diameter of which is a few millimeters in excess of that of the bomb body, the tube being kept apart from the bomb by means of a ring -d The tube -dis greater in length than the bomb body, has four wings f at its bottom end and some holes f at its top end, the purpose of these holes berng explained herebelow. The upper portion of the tube may also be provided with a reinforcement consisting in a band -0Z The tube cZ should be adapted to be slid on a cup-like sleeve and be an easy fit thereon, the sleeve forming an integral part of the sleeve, go to impinge against barrel in the case of the special bomb-thrower (Fig. or being applied to the barrel at the movement of use when ordinary firearms are employed for launching the bomb.

With reference to the ordinary firearms, if the barrel is of such a shape (tulip'sha'pe', for instance) that it can serve to retain the cuplike sleeve, the latteris formed with two half-rings -z' onwhich the sleeve proper h is screwed, the sleeve being mounted on the firearm in the manner indicated in Fig. 6'. If on the contrary the firearm barrel does not lend itself for this purpose, the cup like sleeve comprises, as indicated in Fig. 4, atube 'Z and the sleeve proper 'm. As shown in Fig. 7, the tube -Z is inserted into the barrel of the firearm s from the breech end and then the sleeve m is screwed onthe forwar'd end of the said tube. 11in thils manner the sleeve cannot move in the arre , Mode ofworlcing On the launching charge deflagrating, the

gases impinge against the tail-piece e 5 (Fig. 5) and a portion of them (due to the fact that the diameter of the tail piece is slightly less than the bore of'the firearm, and due also to the inertia of the bomb) almost lnstantaneously go to impinge against the bottom calotte of the bomb, and then, through the small interstice left between the cylindrical bomb portion and the inside of the the end ring .cZ of the tube df. I

As these gases, however, still possess a great pressure at'the moment they reach the upper portion of the tube d, the reinforcement band cZ is provided in order to increase the mechanical strength of the tube, as well as the holes f in order to allow a certain portion of the gases to, escape. In this manner the gases, at the moment the bomb leaves its rest position, simultaneously act upon the bomb at all these points and thus balance their propelling action."

The bomb thus acted upon leaves the firearm, but the gases are not at once free to expand in the air because a large portion of them Is detained in the tube d; these gases are obliged to continue to exert their propelling action on the bomb until the tube (Z will completely leave the sleeve p. An auxiliary expansion chamber is thus formed for the gases, the gas force consequently being J better utilized as :vvefll ifn respect to the duration as in respect 'to the greater regularity of the defiagration of the launching charge. a k

This latter function is performed also by the tail piece .e-, because When the bomb is slid on the firearm the tail piece occupies a certain space of the explosion chamber and thus reduces it to thecor're'ct volume. Moreover the tail piece, in conjunction With the 'tub 'i'd'" servesto guide the bomb during the time the tube is sliding inside the arm.

; During its flight'the bomb is main ain d in thefco'ifr'ect direction bythe system built up 'ofithetube '"cl' an- 1 fear win s f Hav'n g iiovv iticu'larly described a :c e'rta'iiie'd the nature of my saidinventi'on and in Rvh'at manner the same is to be performed,

c twhat I claim age I bomb. for smaller caliber thahthito ft "o'mb itself, including a'bmb body, a ring carried With the near out'erjehd thereof, a "tube carried by the ring 3 and 'surro unding tl'ie bomb in spaced concen- Itri c "relation and 6 rear Wai-dly the body, the space betw'een'the body a'fidtube being "sufiic'ien't to'accom'fnodaite the barrel of a fir arm or preps-r caliber 'ihfe'rder tofal'lovv the gases, on the explosion of the change before the inertia of the bomb has been -overcome, of exerting their propelling action against the. ring so that the bombrmaybe acted upon by the gases from beginn ng and simuitaneously for its entire lengtlnthis action being then continued when the bomb Zbody has left the barrel of the firearm Within the tube.

near the outer end thereof-and resting against I the outer edge of the firearm, a reinforced tu'be carried With the ring and arranged in spaced surrounding relation with the bomb body and extending considerably thermayondand 's'li'dably disposed on the enter surface of. the firearm, a tail-piece an the inner end of the bomb body extending into the bore and guide 'vanes arranged on the outer su rface of the ftl'i be fne ai' tl'ie betelend theater.

6. management as claimed in "claim 5,

\vh e'reiii th tubeis provided with a series or perforations near its point of juncture W it-h the ring, ,satsmanaiiy and for the Pillposesiset forth. 1 j

Signed at Milan Italy, this th day of April 1929. a

DINO "SAMALILA.

2 A bomb according to claim 1, wherein by the expansion of the gases interposed between the bomb and the fire mouth on the explosion ofthe chargean elastic cushion is obtained which holds the bomb body in a coaxial position With regard to the firearm V overcoming the. tendency of theformer to displace itself downwards by means of. its own Weight and in this manner overcoming the frictional'contact between the bomb body and the lower portion of the fire-mouth 3. A bomb according to claim 1',,Wherein the tube forms a secondary shell for theb omb d 7 so that on the e'xplosion of theinternalcharge of the bomb body, the bursting effect of the gases considerably increased inasmuch a these latter after having destroyed the ivalls of the bom bibody instead'of'being dispersed, destroy by their residual force the "external tube so. that 'the 'action 'of the bomb a'n'd it s 'tot'alefiect are increased.

' i. A bomb is claimed in (51min 1 sea in 

